idle

  1. 9

    Engine Won’t go past idle

    I got a 93 foxbody that I had a blown lower intake gasket on so I tore it apart and replaced that. After getting it back together I can’t get it to go past idle when starting it. I still got good fuel pressure at 40psi at idle. It’s got a Pro M ECU and wiring harness, been converted to coil on...
  2. Xterminator03

    Idle kpa

    I'm tryin to get my car to idle properly. It Is idling at about 95kpa, afr is very rich and Everytime I lower the fuel demand it shuts off. It has large cam in it but I don't know the exact specs. All I know it was a nitrous build with a solid roller with close to a 600 lift.
  3. S

    Another Idle surge post with microsquirt

    I have a 86 GT, 5spd. Engine is a 5.0(302) with gt40 heads and intake. e303 cam and shorty headers with catless xpipe. I am running microsquirt from efisource and an aem xseries wideband. Engine starts and runs great up to operating temp. I have an electric fan that's controlled by the ecu and...
  4. T

    Engine Foxbody idling surging and stalling

    Hello, I have a 89' foxbody and I recently took apart the upper manifold and cleaned all ports, put it back together and it idled in the 1,500s without coming down for 30 seconds. I went ahead put a new IAC and TPS, and adjusted the idle down to 800 RPMs. The car didn't run good after any of...
  5. Hudson N

    Should it run with IAC unplugged? 04 gt

    I've been having surging issues for a couple of months now. I replaced my IAC and checked for vacume leaks and tested my TPS. The surge is only slight. Maybe 25-50 rpm when its warm and on a real cold start it surges quite a bit for about a minute before smoothing out. I've done a reset and I've...
  6. J

    04 GT New intake manifold and car now has a rough idle

    I'm new here but I have a 04 GT standard trans and my OEM plastic manifold broke at the heater hose fitting so I replaced it with a professional products typhoon intake manifold and I installed it and now the cars idle is very rough. Bouncing between 1200 rpms and 500 rpms. Thought it could be...
  7. L

    Engine Rough Idle at Start, Possible CMCV Vacuum Leak

    Hi, I have a 2015 salvaged coyote in a 67 mustang running on the control pack. Everything is up and running, but it seems to have a rough idle at start. The idle continues to be rough until I rev the engine and it settles down to normal at around 1000rpm for about 5 seconds, after 5 seconds...
  8. N

    Engine 1987 LX 5.0 5 Speed - idle and . . .

    Hello all. This is my first post on this forum. I thank you in advance for the time and consideration you give to my issue. So, I just picked up a 1987 Ford Mustang LX 5.0, hatchback, 5 speed, all original, 100% stock, 27k miles. The thing looks like it was buried in an air tight time...
  9. D

    98 Rough idle and ride after motor and tranny mounts

    Hi there, Strange question, I had both motor mounts and tranny mount put in my mustang last week. I noticed right away when I got in the car and started it up that I could feel a crazy vibration in my seat and in the steering wheel that wasn't there before. While accelerating, I notice a large...
  10. J

    2010 gt threw a code saying both banks 02 sensors lean conditions . Car dies

    My 2010 gt has 45000 miles on her with frpp hot rod cams , frpp injectors , stock manifolds and cats, muffler delete and jlt CAI. It’s a 5 speed manual. Today it was running fine and the cel came on I pooped into oreilly and they scanned it and said both o2 banks were lean condition but it...
  11. M

    High idle, big mystery

    (This is copypasta from AllFordMustangs. I promise I'm not a bot, I just posted there first) EDIT: This turned out to be the Idle Air Control Valve. I replaced it, problem solved. I have a 95 3.8, the other day I noticed all of a sudden it was idling high. I had been going down a 35 MPH hill...
  12. A

    Engine 1998-Stumbles when fan kicks on

    150K miles, dual exhaust, cold air intake. Coolant flushed last year but looks muddy already since before I got it it went 5 years on a change. Ok so. This only happens when it’s hot out like it’s starting to get. Whenever I’m at idle (~750 rpm) and the fan kicks on it drops to about 500 and...
  13. Pinkcloud

    302 Idle Help

    Hello guys I need help with my 91 mustang GT, recently replaced the lower & upper intake and had to remove the heads to get 2 broken bolts drilled out . Reassembled and whenever I start the car it jumps straight to redline and stats there .If I disconnect the intake tube it idles around...
  14. R

    Engine Idling Issue

    Hey everyone, need a more car savy feller to assist me today. Here's my issue: My 03 GT was beginning to stall whenever I slowed down at a light, sign, etc but it idled fine. My first thought was the IAC was going bad. So, after finding one at autozone, I replaced the part and solved the...
  15. Createawon1

    Burnt Up 10 Pin Connector 89 Gt

    Hi! 89 GT with 158,xxx , no modifications. I have been working down the surging idle checklist and so far everything helps a little bit but doesn't solve it. On cold starts it dies unless I rev it up a bit. Codes 11, no vacuum leaks. PCV, IAC, MAF are clean and functional. I separated the ten...
  16. 96nickSn95

    Runs Fine But Idles Low When In Drive

    So just adjusted the TPS in my 1996 mustang 4.6L V8. It's pretty much stock, just replaced some minor parts with OEM equivalent parts (like maf sensor and IAC and such). The biggest after market part I have bolted on is a Dorman intake manifold for NPI heads. Now the other day my stang died on...
  17. Caydink1998

    2000 Mustang V6 Shaking

    i don't know much about cars this why I come here for help, well just this morning I woke up had to drive somewhere and I turned my car on and it was shaking not violently but very noticeable and I've read on here with people who had similar problems and I'm hearing tons of stuff, engine...
  18. 0

    Please Help!

    I have a 2000 Ford Mustang V6 3.8L engine with a 5 speed manual transmission. We believe the car was in an accident at some point. The title says by previous state NV : rebuilt. The car shows minor quirks that resemble an accident and it seems a little loose when driving it. When driving the car...
  19. J

    Idle Only With Full Choke?

    Hey everyone, in need of a little advice. My engine was running fine (maybe a little too rich) until I swapped the spark plugs. All of a sudden the engine starts misfiring and running terribly even after i checked the gaps. I watched the mechanic down the street tweak the carb a little and he...
  20. NRB Auto

    01 Gt Cold Start Idle Fluctuation?

    I have a 2001 GT, NOT ALWAYS but usually only in direct morning under "cold start" conditions I will get a high idle of 1,600RPMS. Now and then if you put it in gear it will drop RPMS and die out. If you restart the mustang right away idle will return to normal. If not about every 30 seconds or...